Re: Vertical retrace interrupts?
flat view
From: Antonino Daplas <hidden>
Date: 2003-01-30 23:35:57
On Thu, 2003-01-30 at 19:45, Michel Dänzer wrote:
On Don, 2003-01-30 at 03:34, Antonino Daplas wrote:quoted
On Wed, 2003-01-29 at 03:21, James Simmons wrote:quoted
quoted
Are there any plans on merging DirectFB features? Stuff like vertical retrace interrupts etc.?I wholeheartedly agree with this. There are a lot of applications out there (especially video players) where vtrace signal delivery is critical for optimum operation. Polling for VGA registers is not totally correct for newer cards and is too inefficient, so this has to be done at a per driver level.Let me point out that the DRM in XFree86 4.3.0 and 2.5 kernels has a generic ioctl which can block or send a signal on vertical blank interrupts.
Yes, I've seen the dri list archives, and adding support for this in fbdev will result in code dupliation :-(. However, at least 3 people have mailed me that they are using their somewhat old pc as a set top box with mplayer, DirectFB and i810fb. No X. The image instability is noticeable because they are driving big-screen TV's, especially because DirecFB is double-buffered, with triple-buffering in the TODO list. It's because of this that I have to hack in vretrace signal delivary to i810fb. There's also a similar patch for matroxfb. Tony ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com